package dom.domain;

import java.util.List;

import org.hibernate.LockOptions;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Example;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.transaction.annotation.Transactional;

/**
 * A data access object (DAO) providing persistence and search support for
 * Expert entities. Transaction control of the save(), update() and delete()
 * operations can directly support Spring container-managed transactions or they
 * can be augmented to handle user-managed Spring transactions. Each of these
 * methods provides additional information for how to configure it for the
 * desired type of transaction control.
 * 
 * @see dom.domain.Expert
 * @author MyEclipse Persistence Tools
 */
@Transactional
public class ExpertDAO {
	private static final Logger log = LoggerFactory.getLogger(ExpertDAO.class);
	// property constants
	public static final String EXPERT_NAME = "expertName";
	public static final String EMAIL = "email";
	public static final String PASSWORD = "password";
	public static final String EP_ID = "epId";
	public static final String USER_SUB_TYPE = "userSubType";

	private SessionFactory sessionFactory;

	public void setSessionFactory(SessionFactory sessionFactory) {
		this.sessionFactory = sessionFactory;
	}

	private Session getCurrentSession() {
		return sessionFactory.getCurrentSession();
	}

	protected void initDao() {
		// do nothing
	}

	public void save(Expert transientInstance) {
		log.debug("saving Expert instance");
		try {
			getCurrentSession().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Expert persistentInstance) {
		log.debug("deleting Expert instance");
		try {
			getCurrentSession().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public Expert findById(java.lang.String id) {
		log.debug("getting Expert instance with id: " + id);
		try {
			Expert instance = (Expert) getCurrentSession().get(
					"dom.domain.Expert", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Expert instance) {
		log.debug("finding Expert instance by example");
		try {
			List results = getCurrentSession()
					.createCriteria("dom.domain.Expert")
					.add(Example.create(instance)).list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding Expert instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Expert as model where model."
					+ propertyName + "= ?";
			Query queryObject = getCurrentSession().createQuery(queryString);
			queryObject.setParameter(0, value);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByExpertName(Object expertName) {
		return findByProperty(EXPERT_NAME, expertName);
	}

	public List findByEmail(Object email) {
		return findByProperty(EMAIL, email);
	}

	public List findByPassword(Object password) {
		return findByProperty(PASSWORD, password);
	}

	public List findByEpId(Object epId) {
		return findByProperty(EP_ID, epId);
	}

	public List findByUserSubType(Object userSubType) {
		return findByProperty(USER_SUB_TYPE, userSubType);
	}

	public List findAll() {
		log.debug("finding all Expert instances");
		try {
			String queryString = "from Expert";
			Query queryObject = getCurrentSession().createQuery(queryString);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}
	public List getList(int offset,int pageSize)
	{

		log.debug("finding all User instances");
		try {
			String queryString = "select * from expert as model  order by model.expertId asc";
			Query queryObject = getCurrentSession().createSQLQuery(queryString).addEntity(Expert.class);
			queryObject.setMaxResults(pageSize); // 每页最多显示几条
			queryObject.setFirstResult((offset - 1) * pageSize); // 每页从第几条记录开始
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	
	}
	public Expert merge(Expert detachedInstance) {
		log.debug("merging Expert instance");
		try {
			Expert result = (Expert) getCurrentSession()
					.merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}
	
	public List query(String epname)
	{
		try
		{
			String sql = "select * from expert as a where a.ExpertName like :name";
			Query query = getCurrentSession().createSQLQuery(sql).addEntity(Expert.class);
			query.setString("name", "%"+epname+"%");
			return query.list();
		}catch(RuntimeException e)
		{
			throw e;
		}
	}
	public void attachDirty(Expert instance) {
		log.debug("attaching dirty Expert instance");
		try {
			getCurrentSession().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Expert instance) {
		log.debug("attaching clean Expert instance");
		try {
			getCurrentSession().buildLockRequest(LockOptions.NONE).lock(
					instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public static ExpertDAO getFromApplicationContext(ApplicationContext ctx) {
		return (ExpertDAO) ctx.getBean("ExpertDAO");
	}
}